I used to be able to pick this operation up especially in the Red Top Area in Vallejo, CA. But now I don't hear them anymore and I do have the current frequencies. What's the reason for this? I can't imagine that they somehow lowered their power so they can't be heard at longer distances.
When I go to Sacramento on I-80 I do pick up the air enforcement up there.
Any ideas why not receiving signals from Red Top anymore? I know this is a heavily patroled location.

I used to be able to pick this operation up especially in the Red Top Area in Vallejo, CA. But now I don't hear them anymore and I do have the current frequencies. What's the reason for this? I can't imagine that they somehow lowered their power so they can't be heard at longer distances.
When I go to Sacramento on I-80 I do pick up the air enforcement up there.
Any ideas why not receiving signals from Red Top anymore? I know this is a heavily patroled location.

How close are you to that area? When they did speed enforcement in Sac they would switch over to the blue and do everything on the base frequency (rather than transmitting normally on the mobile frequency). You needed to be fairly close by to hear it (except the aircraft could sometimes be heard about 10-15 miles away).

How close are you to that area? When they did speed enforcement in Sac they would switch over to the blue and do everything on the base frequency (rather than transmitting normally on the mobile frequency). You needed to be fairly close by to hear it (except the aircraft could sometimes be heard about 10-15 miles away).

Before on Channel Master Antenna (Base) I would hear them on that 45.02 freq. about 15 miles away. When in mobil I'm usually within miles of them if not on top of them using an Antenna Specialist Mon-51 Antenna on magnet mount. In sac. when I'm mobile I hear them on 42.340 but signals are weak.

Last saturday morning Air-31 was assisting the Redwood City Office (#91XX units) performing Speed Enforcement Information to (5) ground units. They were monitoring I-280 traffic between SR92 and Farm Hill Road. They started around 10am and worked the area for 1-2 hours. Alot of cars were cited for speeding in the 80 to +85 mph range. Originally the plane wanted to use the Blue1-Border Freq ( 39.14/42.18 162.2PL) but had to settle for Blue-GoldGate (42.34/2.18 131.8PL) because 1 unit's radio didn't have the Border freqs. I would suggest that in order to monitor Air-to-Ground comms, you should enter ALL the active CHP frequencies (w/ no PL tone) into your scanner. I guess the old Ivory & Tac-6 days are over. At least for a while. Anybody monitoring the Speed Enforcement Operations in the Applegate - Roseville Corridor (I-80 Sacramento Dispatch Center), please provide information. Thanks.

Last saturday morning Air-31 was assisting the Redwood City Office (#91XX units) performing Speed Enforcement Information to (5) ground units. They were monitoring I-280 traffic between SR92 and Farm Hill Road. They started around 10am and worked the area for 1-2 hours. Alot of cars were cited for speeding in the 80 to +85 mph range. Originally the plane wanted to use the Blue1-Border Freq ( 39.14/42.18 162.2PL) but had to settle for Blue-GoldGate (42.34/2.18 131.8PL) because 1 unit's radio didn't have the Border freqs. I would suggest that in order to monitor Air-to-Ground comms, you should enter ALL the active CHP frequencies (w/ no PL tone) into your scanner. I guess the old Ivory & Tac-6 days are over. At least for a while. Anybody monitoring the Speed Enforcement Operations in the Applegate - Roseville Corridor (I-80 Sacramento Dispatch Center), please provide information. Thanks.

They used to do this exact thing up on I-80 East Fairfield Red Top Exit.
I drive up and down I-80 East through Sac. to Roseville and I can usually hear the Sac. units on 42.340 around Meridian exit.
But I no longer hear anything at Redtop.
What is the PL tone? I have always had all CHP frequencies programmed.

From what I've read (including the newish CHP channel fleetmap excel spreadsheet available on this forum) the "Ivory" was retired a couple years ago and isn't programmed anymore. I have always heard the Base side of the Blue (called Car-to-Car "C-C") and even the base/C-C side of the local area dispatch channel (as opposed to the Car-to-Station, "C-S" version of the channel which listens on the base freq and transmits on the mobile freq).

Thanks for the heads up on the out of area use of Border Div Blue-1! I've definitely never heard them do that before.

I used to be able to pick this operation up especially in the Red Top Area in Vallejo, CA. But now I don't hear them anymore and I do have the current frequencies. What's the reason for this? I can't imagine that they somehow lowered their power so they can't be heard at longer distances.
When I go to Sacramento on I-80 I do pick up the air enforcement up there.
Any ideas why not receiving signals from Red Top anymore? I know this is a heavily patroled location.

Have you considered the possibility that they're not doing any sort of special enforcement at the time you're trying to hear them doing special enforcement ops?

And just FYI, despite it seeming to be pretty stupid for them to do so, I have heard a CHP plane doing VASCAR ops with several ground units solely on 154.905 a couple years ago. Dunno where they were doing it at, but the plane was audible in Redwood City.

Have you considered the possibility that they're not doing any sort of special enforcement at the time you're trying to hear them doing special enforcement ops?

And just FYI, despite it seeming to be pretty stupid for them to do so, I have heard a CHP plane doing VASCAR ops with several ground units solely on 154.905 a couple years ago. Dunno where they were doing it at, but the plane was audible in Redwood City.

I used to watch the plane in the air then hear them on the radio and watch the cars make t heir rounds.

From what I've read (including the newish CHP channel fleetmap excel spreadsheet available on this forum) the "Ivory" was retired a couple years ago and isn't programmed anymore. I have always heard the Base side of the Blue (called Car-to-Car "C-C") and even the base/C-C side of the local area dispatch channel (as opposed to the Car-to-Station, "C-S" version of the channel which listens on the base freq and transmits on the mobile freq).

Thanks for the heads up on the out of area use of Border Div Blue-1! I've definitely never heard them do that before.

I will have to see if I can locate that spreadsheet you are talking about on here.
With the State of CA funding or lack of I wonder why are they messing around with their communications in giving up those channels.

The weather seems to have squashed the air unit for awhile, at least Applegate to Clipper Gap - have not heard or seen them doing anything lately. They have used Blue2 (44.84) and sometimes the Green2 (45.36) for who knows what reason. (Before the frequency changes it was the Blue and Green of course) I've never heard them fussing over channels - it's always the Blue or Green.

Having said that, LIDAR has gotten really popular...

Going west, you won't find the air units working speed until you get to Antelope - Greenback/Elkhorn, which would be on Blue2.

I hear speed enforcement all the time in the Sacramento area, usually on Blue2. In the past couple of days I have heard aircraft on the CHP AM Aircraft frequency but they weren't doing speed enforcement. You just have to listen and you need a good antenna and/or location.

The weather seems to have squashed the air unit for awhile, at least Applegate to Clipper Gap - have not heard or seen them doing anything lately. They have used Blue2 (44.84) and sometimes the Green2 (45.36) for who knows what reason. (Before the frequency changes it was the Blue and Green of course) I've never heard them fussing over channels - it's always the Blue or Green.

Having said that, LIDAR has gotten really popular...

Going west, you won't find the air units working speed until you get to Antelope - Greenback/Elkhorn, which would be on Blue2.

Blue 2 (44.84) and Gren 2 (45.36) What are th freqs. for Blue and Green?

I hear speed enforcement all the time in the Sacramento area, usually on Blue2. In the past couple of days I have heard aircraft on the CHP AM Aircraft frequency but they weren't doing speed enforcement. You just have to listen and you need a good antenna and/or location.

I had a great antenna before an AS Mon51. Now I am using the Radio Shack one with two coils in antenna. You would think that at the elevation that plane is at that the signal would carry pretty far..

Have you considered the possibility that they're not doing any sort of special enforcement at the time you're trying to hear them doing special enforcement ops?

And just FYI, despite it seeming to be pretty stupid for them to do so, I have heard a CHP plane doing VASCAR ops with several ground units solely on 154.905 a couple years ago. Dunno where they were doing it at, but the plane was audible in Redwood City.

A year or three ago I was listening and the air unit called down with someone coming down "past the century mark". Two clocks for 102 mph, a 'vette. The air unit offered the ground unit the option for taking him for reckless. The driver mouthed quite a bit about the ticket and they ended up impounding the car and taking him into custody for the reckless driving (automatic over 100).

a year or three ago i was listening and the air unit called down with someone coming down "past the century mark". Two clocks for 102 mph, a 'vette. The air unit offered the ground unit the option for taking him for reckless. The driver mouthed quite a bit about the ticket and they ended up impounding the car and taking him into custody for the reckless driving (automatic over 100).